Plush-burr for knitting-machines



(No Model.) v

G. W. CUMMINGS.-

PLUSH BURR POR KNITTING MACHINES.

No. 416,256. Patented Dec. 3. 1889.

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`UNITED STATES PATENT OFFICE..

GEORGEV, CUMMINGS, OF COHOS, NE\V YORK.

PLUSH-BURR FOR KNlTTlNG-IVIACHINES.

SPECIFICATION forming part of Letters Patent No. 416,256, dated December 3, 1889.L

' Appncaiuiedrama-,112,1889. saturo. 299.613. (remodel.)

To all whom it may concern:

'Be it known that 1, GEORGE W. CUMMINes, a citizen of the United States, residing at Cohoes, county of Albany, and State of New York, have invented a new and useful Plush- Burr for Knitting-Machines, of which the following is a specification.

My invention relates to plush-burrs for knitting-machines; and the objects of my invention are, first, to produce a more elastic cloth and of a heavier backing than heretofore; second, to dispense with the use of a presserdisk or presser-bits upon the plush 'or backing-thread burrs of the knitting-machine; third, to prevent the breaking of the needles of the knitting-machine.

Heretofore in making plush cloth it has been necessary to employ a notched steel presser-disk or presser-bits upon the burrs of the knitting-machine to depress certain of the needles between the wings or blades of the plush-burr. When the pressure of the steel presser-disk or presser-bits upon the needles is too great, or, again, when the continued and repeated pressure of the said presser-disk or presser-bits weakens them, a large number of the needles' are broken. Again, when the usual or Yordinary forni of plush-burr is used, owing to the pressure of the presser disk or bits the needles can enter between the blades of the burrs only to a limited depth; hence the yarn must of necessity be laid nearly straight, and the cloth produced thereby is non-elastic.

In my improvement I dispense entirely with the presser disk or bits, and when knitting plush cloth with a burr constructed i`n accordance with my invention lthe yarn can,by reason of the sinkers playing into the spaces between the blades of the wheels and carrying portions o f the yarnor thread into said spaces,

be laid in any desired length of stitch by adj usting the burr in or out of the needles, and a more elastic cloth is produced.

My improved plush-burr in its most complete and preferred form comprises a wheel having inclined blades formed with nibs for engagement with the yarn or thread in the manner usual with the burrs used in springneedle knitting-machines, a cam-shaped disk placed next to said wheel, a wheel or disk provided with inclined plain blades placed next to said cam-disk, a flange or disk having a series of inclinedslots in its periphery and an annular recess in itsunder side, a ring litted to the said recess, a series of lingers or sinkers pivoted on the said ring and lying in the slots of the flange or disk, and also adapted to be pressed into certain of the spaces between the blades of the wheel and disk referred to, and a cap having a flange which fits partly over the slotted disk and serves to hold the sinkers in place and limit the outward movement thereof, the whole being placed upon a supporting-stud having provisions for preventing the rotation of the cam-disk thereon.

In the accompanying drawings, Figure 1 is a side view of the plush-burr arranged in connection with the needles of the knittingmachine. Fig. 2 is a plan view of the wheel having blades with wings or nibs thereon.

Fig. 3 is a side view of the wheel shown in Fig. 2 with a part thereof cut away. Fig. 4 is a plan view` of the stationary cam-disk. Fig. 5 is a side view of the cam-disk shown in Fig. 4. Fig. 6 is a plan view of the wheel or disk with plain blades. Fig. 7 is a side view of the wheel shown in Fig. with a part thereof cut away. Fig. S is a view, from the under side, partly cut away, of the body of the burr, some of the parts being omitted. Fig. 9 is a side elevation, partly cut away, of the parts shown in Fig. S. Fig. 10is a plan view, from the under side, of the flange with a wire for pivoting the sinkers therein. Fig. 11 is a side view of the flange shown in Fig. 10 with a part thereof cut away. Fig. 12 is a plan view of the ring placed in the recess ot the flange shown in Fig. 10. Fig. 13 isa sectional view of the sinker. Fig. 14s is afi-ont view of the same sinkcr. Fig. 15 is an elevated sectional view of the cap placed upon the flange OO a shown in Fig. 10. Fig. 16 is a plan View of the same lcap. Fig. 17 is an elevated view of the stud upon which the burr is placed, with a slot therein on one side for the purpose ot' receiving the projection on the inner circle of the cam, as shown in Fig. et. Fig. 18 is a plan view of the stud shown in Fig. 17. Fig. 19 is a sectional view of the washer used upon the stud shown in Fig. 17. Fig. 2O is a plan view of such washer. Fig. 21 is a side view of the nut placed upon the spindle shown in IOO Fig. i7 to hohl the burr in its place on the said stud. Figs. 22 and 23 are respectively side and t'rontelevationsot a modilied form ot construction ot' sinkers sometimes used by me. In the drawings, A is the pluslrblu'r7 as shown in Fig. l, and is composed ot the several elements hereinat'ter more particularly described.

In the said` drawings, .t is a portion of the 1o cylinder ot' a circular spring-bearded-needle kntting-nlachine, and N is a portion of the needles thereof.

I is a supportingstud, which in practice will be mounted and sustained in the cus- I 5 tomary manner in which t-he supportin fir-studs for the sinker and knittingavheels of circular-knitting machines are supported. The upper portion i of this stud is of less diam eter than the lower portion 1I", a shoulder s 2o being formed at the upper end of the latter, while a second shoulder s is formed at the upper extremity of the stud by the reduction of the said extremity, as shown in Fig. 17, the extremity being screw-threaded at 7.'.

B, Figs. 2 and 3, is a wheel having a passage or opening '3' through its hub or central portion to lit it for being placed upon the portion i of the stud I, and having inclined blades I formed with nibs or projections, as 3o shown, for engagement with the yarn or thread laid upon the needles.

D, Figs. 1t and 5, is a cam-shaped disk having a central eye D, in which is a projection d, which enters the groove 1' in stud I when the disk is placed upon the latter and serves to hold the disk from rotating.

C, Figs. (5 and 7, is a disk or wheel having plain inclined blades c projecting from the periphery thereoffand provided with a cen 4o tral hub or sleeve c2, which lits upon the portion t" of stud I, the lower end of said hub or sleeve resting against the shoulder s. Upon the outside oi' the hub or sleeve c2 are placed the flange E and the cap Il. rI`he i'lange E, Figs. l0 and ll, has inclined slots c Aformed in its periphery, and in its under side is formed an annular recess c, in which is placed a ring F, Fig. l2. A series of lingers or sinkers G, each having a flattened upper portion, 5o as shown in Figs. 13, ll, 22, and 23, and an upturned lower end, are placed in the slots c', the lower upturned portion of said lingers passing around the ring F, as shown in Figs. S and t). The cap Il, Figs. l5 andlt, is placed against the under sideof the flange E, around the hub of said ilange, and its lip 7L" extends up around the periphery of the said flange, the said lip serving to limit the outward movement of the sinkers G. Flange E has 6o on its upper sidea pin c2, which enters a corresponding hole in the wheel t) to secure proper alignment of the slots c with the spaces between the blades of the wheel C. A screw C unites the iiange E to the wheel C, i 5 and a screw e4, passing through a hole cin the cap Il, unites the latter to the flange E. The sinkers (l are placed in every second or third space between the blades of the wheels l-S (l, or are otherwise arranged, as desired. In Figs. I3 and 14 l have shown the flattened portions el the said sinkers formed with grooves r/ to tit upon the needles; but they may be left plain, as shown in Figs. 22 and 23, if desired. The parts having been placed upon the stud I with. the cam-disk 'between the wheels B and (1,21 washerJ is slipped upon the upper end ot the stud against the shoulder s and a nut l( is turned down upon the threaded portion It' against the washer.

In operation the sinkers G on the side of the plush-burr opposite from the needles are held by the cam-disk D in the outward position. (Shown in Fig. l.) The yarn or thread is laid against the blades of the wheel B while the sinkers are in this outer position by the thread-guide in the usual manner, and as the burr is rotated by engagement ot the needles with the blades c the sinkers G are presented successively to the needles. Contact of the sinkers with the upper ends of the needles forces the sinkers into the spaces between the blades Z), carrying portions of the yarn or thread into the said spaces. By this means such portions of the yarn or thread are held in front of the needles, while theremaining. portions are laid on 4the rear sides of the needles in the further rotation ot' the plush-burr, to be subsequently bound into the knitted fabric in the usual manner.

In practice the disk D is useful for insi1r' ing the outward movement oi the sinkers affter they have left the needles and for holding them out in position to enable the yarn te be laid between them and the blades ot' the wheel l. I contemplate, however, in some cases omitting the said disk and relying upon gravity and centrifugal force to throw the said sinkers out and hold them out in posi tion to receive the yarn.

llaving described my invention, I claim and desire to secure by Letters Patent l. The combinatiolnwith the wheel having the blades provided with nibs, as described, of the stationary cam-disk, the wheel or disk having plain blades, the tiange having a slotted periphery and an annular recess in its under side, the ring in said recess, the sinkers pivoted on said ring and playing in the slots in the llange and in the spaces between the blades of the two wheels, and the cap having the lip fitting the said slotted ilange, as described.

2. The combination, with the wheel having the blades with nibs, of the wheel with plain blades, the stationary camdisk between said wheels, the flange, and the sinkers pivoted to said (lange, as described.

3. The combination, with stud I, of the wheel having blades with nibs, the cam-disk having means whereby the same is held `from rotation upon said stud, the wheel with plain blades, the flange, and the sinkers pivoted .to said flange, as described.

l. The combination, with the wheel having ICO IIO

sinkers entering the spaces between certain of the blades of said Wheel and adapted to be depressed therein bythe action of the needles of a knitting-machine, and` a support I5 on which said sinkers are pivotally mounted, substantially as described.

GEORGE V. CUMMINGS.

Witnesses:

CHARLES GIRVIN, G. S. WARNER. 

